plandex-ai/plandex · error

unsupported data type: %T

Error message

unsupported data type: %T

What it means

OrgUserConfig implements sql.Scanner; its Scan only handles []byte, string, and an empty-string special case, and rejects everything else (including nil/NULL) with this error. It fires when the DB column value isn't JSON text.

Source

Thrown at app/shared/org_user_config.go:46

	if src == nil {
		*p = OrgUserConfig{}
		return nil
	}
	switch s := src.(type) {
	case []byte:
		if len(s) == 0 {
			*p = OrgUserConfig{}
			return nil
		}
		return json.Unmarshal(s, p)
	case string:
		if s == "" {
			*p = OrgUserConfig{}
			return nil
		}
		return json.Unmarshal([]byte(s), p)
	default:
		return fmt.Errorf("unsupported data type: %T", src)
	}
}

func (p *OrgUserConfig) Value() (driver.Value, error) {
	if p == nil {
		return nil, nil
	}
	return json.Marshal(p)
}

View on GitHub (pinned to e2d772072e)

Solutions

1. COALESCE the column in SQL so NULL never reaches Scan.
2. Add a nil case assigning OrgUserConfig{} before the default branch.
3. Confirm the column type is JSONB/TEXT so the driver yields []byte/string.
4. Audit ORM/struct tags to make sure Scan is bound to the right column.

Example fix

// before
default:
    return fmt.Errorf("unsupported data type: %T", src)
// after
case nil:
    *p = OrgUserConfig{}
    return nil
default:
    return fmt.Errorf("unsupported data type: %T", src)

var cfg OrgUserConfig
err := db.QueryRow("SELECT COALESCE(org_user_config, '{}'::jsonb) FROM org_users WHERE id=$1", id).Scan(&cfg)

func scanableColumnValue(src any) bool {
    switch src.(type) {
    case []byte, string:
        return true
    default:
        return false
    }
}

var cfg OrgUserConfig
if err := rows.Scan(&cfg); err != nil {
    if strings.Contains(err.Error(), "unsupported data type") {
        cfg = OrgUserConfig{} // zero-value fallback
    } else {
        return err
    }
}

When it happens

Trigger: Scanning a NULL org_user_config column (driver passes nil -> default branch); driver returning non-text types for the column; wrong column mapped to the OrgUserConfig field.

Common situations: Rows created before the config column was populated (NULL defaults); schema or driver changes altering the delivered Go type; ORM mapping mistakes pointing Scan at an int/bool column.

Related errors

• unsupported data type: %T
• unsupported data type: %T
• unsupported data type: %T
• unsupported data type: %T
• error invalidating conflicted results: %v

AI-assisted analysis of plandex-ai/plandex@e2d772072e (2026-09-05). Data as JSON: /api/errors/70d64a05e8509a3a. Report an issue: GitHub.